Pocket knife



FIG. 1 is a front perspective view of a pocket knife embodying my new design with the blade in the retracted position;

FIG. 2 is a view similar to FIG. 1 with the blade extended fully;

FIG. 3 is a side elevational view with the blade retracted;

FIG. 4 is a bottom rear perspective view thereof with the blade retracted; and,

FIG. 5 is a bottom rear perspective view with the blade extended. 

The ornamental design for a pocket knife, as shown. 